Investigation of multi-scale spatio-temporal pattern of oldest-old clusters in China on the basis of spatial scan statistics
Fig 4
Clusters distribution of oldest-old index in county areas, 2000–2010.
Figures are drawn by the authors according to the standard map of the National Surveying and Mapping Geographic Information Bureau (Approved drawing number: GS (2016)2893) (http://bzdt.nasg.gov.cn/). All maps on this website are available for free download without copyright.